The truck smashed into Davison's SUV about three miles north of the Maryland-Pennsylvania border, according to Penn Live, forcing the vehicle off the road. Pennsylvania State Police say after Davison's car was forced off the road, someone got out of the truck and opened fire on Davison.

Davison was wounded when authorities found him, and later died of his injuries at a hospital.

Defense contract employee and former Navy reservist Aaron Alexis, 34, allegedly opened fire shortly after 8 a.m. inside building 197 in the Washington Navy Yard, <a href="http://www.huffingtonpost.com/2013/09/17/washington-navy-yard-shooting-victims_n_3940206.html" target="_hplink">killing 12 people and wounding more than a dozen others</a>. Alexis was slain in a gun battle with police.